check out:
http://www.marksdailyapple.com/
They have a lot of pros and cons. Lots of veggies and no sweets except a few fruits. Nuts and some dairy. You can have BACON! Protien is good, eggs are fine. Fats do help satisfy the appitite. I don't gain when I am doing it. I have huge problems over the holidays when every one is pushing bread, sweets and chips.
I have a friend who is vegan. No animal products period, she looks gaunt.